Sand valve or strainer.



A. HAMILL.

, SAND VALVE 0R STRAINER. APPLICATION .IILBD 113.24. 1913.

1,078,674. Patented Nov. 18, 1913.

/2 i 2 f/j 49 ALEXAND R. 11mm, or BALTIMORE; MARYLAND.

SAND VALVE R STRAINER.

mam.

Specification of l'letters ratent;

Patented. Nov. 18,1913

Application ma ram e 191a. Serial No. 750,402.

To all 'whom it may concern:

Be it known that I, ALEXANDER HAMILL,

a citizen of the United States, residing at Baltimore, in the State ofMaryland, have invented certain new and useful Improvements. in SandValves or Strainers; and I do declare the toll owing to be a full,clear, and exact description of the invention, such as will enableothers skilled inthe art to which it appertains to make and use thesame.

This invention rel-ates to improvements in sand valves or strainers torwater filters, and more particularly the one-covered by U. S. Patent No.990,861 granted to 'me May 2, 1911.

The object of the present invention is to improve and simplify theconstructionct the device whereby the parts may be produced andassembled atd'ess expense and the entire device rendered. more ellicientand reliable in operation.

With this and other objects in view, the

' invention consists otcertain novel features of construction, and thecombination and arrangement of parts as will be hereinafter more fullydescribed and claimed.

In the accompanying drawings ;-Figure 1 is a side view oi my improvedvalve or strainer; Fig. 2 is a vertical section thereof; Fig. 3 is aplan view of the base member of the valve; Fig. 4 is a similar viewofone of the water deflecting disks; Fig. 5 is a cenoral vertical sectionot the combined outer water deflecting plate and cap illustrating theshape of the same before being clamped onto the other deflecting platesor disks of the valve. Fig. =6 is-a top plan view of the complete valve.

Referring more particularly to the drawing, 1 denotes the base orattaching member of my improved valve or strainer, said base having onits upper end aconcav-ed or cup shaped annular flange Qthe upper edge ofwhich is beveled or inclined outwardly and downwardly as shown. The bodyof the base" below the flange 2 is preferably o f squared or hexagonalform to permit the application of a wrench, while the lower end of thebase is reduced to form a cylindrical nipple 3 which is ex-ter-i-orlythreaded and is designed to be screwed into a threadjod aperture in thebottom of the filter or other object to which the same is applied.

The base 1 is provided witha centrally disposed bore or water passage 4the upper end of which communicates with .the space in the cup shapedflange 2 while the lower end of said passage is preferably flared asshown. Arranged transversely across the center of the flange 2 andformed integral therewith is a stud supporting bar 5 on which is formedan upwardly extending threaded disk supporting stud 6.

Engaged with the stud 6 are a series of circular water deflecting platesor disks 7 which are disposed one above the other in spaced relation.Each of the plates or disks 7 comprises an annular downwardly andoutwardly inclined ring in which and formed integral with the inner edgethereof is a transverse attaching bar 8 having an enlarged centralportion provided with an aperture 9 adapted to receive the stud 6. Inassembling the platesor disks the bars 8 are disposed in line one abovethe other and above the cross bar 5 of the base. ()n the cross bars 8 ofthe plates or disks are formed depending parallel stop lugs 10. The lugs10 of the lower plate or disk 7 are engaged with the opposite sides ofthe cross bar 5 of the basemembcr while the lugs 10 of each successiveplate or disk are engaged with the bar 8 of the next lower plate, saidlugs of each successive plate being disposed on opposite sides of thecentral enlarged portions of the bars as shown, so that when the platesor disks are assembled, the lugs of one disk will not interfere with thelugs of the adjacent disks. By providing, the lugs 10 and arranging thesame as herein shown and described it will be seen that the plates ordisks will be held against rotation on the stud 6 and base of the valve.

The plates or disks 7 are spaced uniform distances apart and from thebeveled or inclined edge of the flange 2 on the base by spacing studs ordetents ll which project from the plates and are preferably formed by:unching or indenting the material from which the plates areformed, saidindented the upper and lower surfaces of the rings to a sufficientextent to form the desired spaces between the plates. The cross bars 8of the plates are also indented from opposite sides to form upwardly anddownwardly projecting detents or spacing studs 12 which engage the crossbars of the next adjacent plates and hold the bars in the same spacedrelation as the rings or outer portions of the plates, as clearly sho-wnin Fig. 2 of the drawing.

The uppermost deflectin v valve is a disk 13 in the orm' of a cap orcentral portion 14'and an integral downwardly lnclineddeflectingflange15. The flange 15 is in the shape of a ring of greater widththanthe rings of the plates 7 and when arranged above said plates 7, proects a suitable distance beyond the outer edges thereof, thisprojecting'portion of the ring theflange 15 onthe outer edge thereof iscontracted or drawn inwai dly to .a slightly greater angle than when inan operatlve po- 1 .sition. The member 13 is constructed in this mannerso that when placed on 'the stud 6 and in engagement with the plates ordisks 7 and forced downwardly or compressed the clamping nut 17 which isscrewed onto the projecting upper end of'the stud, the convexed portionof the member will be flat tened while'the flange 15 will be spread or rexpanded so that said member 13 will exert a yielding pressure ortensionon the spacing studs or detents of the upperv disk 7,

-at one or engage one corner of the nutas shown. In

ito which the valve is applied thus forming .17 is screwe thus holdingsaid disks in position on the base .member of'the valgveaThis'arrangement of the member 13v will also cause 'the same to exert auniform pressure on the parts of the Cplates or disks 7 when the nutposition onthe stud 6.

i In order to prevent the casual "unscrewing" of the nut 17 from thestud, I preferably provide the member 13 with anut locking; projection'18 which is preferably formed y lndentin the portion 14 of said memberore points, preferably soas to thusjarran'ging the projection 1 8'thenut 17 when screwed down into engagement therewith will spring the metaldownwardly until ,the corners of-gthe nut haye cleared ,said

projection Iwlierieupon the resiliency of the metal "will cause theprojection to spring upwardly into engagement with the s de'of the .nut,thus reventmg the unscrewing thereof without; orce. Arranged on thereduced threaded end of the base 1 and engaged with the shouldenformedby said reduce d end isa washer 19 which is preferably formed of a.flat' metal which when the base memberof the valve is screwed into i Iposition will conform with any lrregularitles in the surface of thebottom of the filter or other object member of the downwardly to anoperative a tight connection for the base member of the valve withoutdanger of injuring the threads of the connection.

In the operation of the strainer it will be seen that the water enterinthrough the passage 4 in the base .wi flow freely through the openspaces in the deflecting plates or ,disks 7 and will be. uniformlydischarged from the spaces between said disks. The water when thusdischarged will be deflected downwardly and outwardly from the valve orstrainer without displacing the filtering material. By arranging theplates or disks and assembling the same as herein shown and described itwill be seenthat these plates may be readily removed when necessarywithoutdetaching the base member' ofthe valve from the .filter. Thisarrangement is particularly desirablev in view of the fact that the baseportion of the strainersor valves are frequently embedded in cement andcannot be readily'removed. Thearrangement of the detents varies on thedeflecting'plates or disks so that they are out of register, and theyeflectively prevent the edges of said disks from. becoming jammed-0rpressed together and thus interfering withthe free'passage of the waterthrough the spaces between the plates.

arious changes in the form, proportion and the minor details ofconstructionmay. be resorted to without departing from the principle orsacrificing any of the advantages of the inventionas claimed. Havingthus. described my invention, what Iclaimis;

1. A valve of the class described. comprising a tubular base, a flangevaround its upper end, a cross bar within the flange, a stud rising fromthe centerof said bar, a series of spaced disks each consisting of aring .abovesaid flange and a cross bar within. the ring having "acentral aperture, an uppermost disk consisting of a normally convexcentral 'portionlpierced with an aperture anda marginal mclined flangewider than depending 111 pairs from theedges ofsald crossbars,the-lowermost pair engaging thecrossbar of the body flange, the nextpair said rings, meansfor spacing the disks, lugs above'engagingthecross bar of the lowermost disk, and so on, and means for clamp-' ingthe uppermost disk upon the others and all of them in position aroundsaid stud.

2."A valve of the character described comprising a tubular base, aflange around its upper end, a cross bar ithin'the flange, a stud risingfrom the center of. said bar, a series of disks each consisting of aring above. said flange and a cross bar within the ring having a centralaperture,an uppermost disk consisting of a central portion pierced withan aperture and a marginal inclined flange, detents projecting from eachj r 180 cross bar andring out of register with thosein the next similarelements, lugs depending in pairs from the edges of said cross bars, thelowermost pair engaging the cross bar of the body flange, the next 'pairabove engaging the cross bar of and so on, and means for clamping theuppermost disk upon the others and all of them in position around saidstud.

'3. A valve of the character described com-" prising a tubular base, aflange around its upper end, a cross bar within the flange, a threadedstud rising from the center of said bar, a series of spaced disks eachconsisting of a ring above said flange and a cross bar within the ringhaving a central aperture,

- an uppermost disk consisting of a normally the lowermost disk, I

convexed central portion pierced with an aperture and a marginalinclined flange wider than said rings, means for spacing the disks,means for preventing the rotation of one disk upon another around saidstud, the uppermost disk having a projection rising therefrom adjacentitsaperturc, and a nut threaded onto the upper end of said stud and heldin place by said projection.

In testimonywhereof I have hereunto set my hand in presence of twosubscribing witnesses.

ALEXANDER l-IAMILL. Witnesses L. O. HILTON, M. H. S'rUAuu.

